« previous next »
Pages: 1 [2]   Go Down

Author Topic: Fan - stays too cool  (Read 3326 times)

0 Members and 2 Guests are viewing this topic.

MYSTANGT

  • Guest
Re: Fan - stays too cool
« Reply #15 on: January 28, 2010, 10:10:18 AM »
I see...well i am trying ot score a used one cheap and ill replace it. In the mean time...

Can someone please direct to a step by step t-stat install?

Maybe i did put it in wrong and is leaking by the gasket...I have installed 25 in my life without issues but maybe this time i did miss something...ill never know unitl i re-do it STEP BY STEP

Question now is. Does the thermostat gasket go on AFTER or BEFORE the t-stat goes in? Meaning does it seal between the manifold and the t-stat OR the t-stat and the water neck?
Logged

Offline chardrc

  • Member
  • Posts: 3535
Re: Fan - stays too cool
« Reply #16 on: January 28, 2010, 10:18:20 AM »
thermostat goes into a recessed grove in the head. so the gasket goes between the head thermostat and the housing..
« Last Edit: January 28, 2010, 10:18:42 AM by chardrc »
Logged
1990 YJ 4cly, ax5, 2.5 inch BDS lift, 31 MTr\'s,  Powertrax-lockers all around, track-bars removed, boomerang shackles, warn m8000 winch, electric fan. [sold but not forgotten]

2007 jk Rubicon 2dr

MYSTANGT

  • Guest
Re: Fan - stays too cool
« Reply #17 on: January 28, 2010, 10:22:41 AM »
...that uis how i installed it....  why am i the odd one out having issues warming up while everyone else has issues cooling down...  :brick:

Although, not for nothing I am VERY glad im runnig too cool VS. too hot   :thumbsup:
Logged

Offline sharpxmen

  • Chief Squirrel BlowerŪ
  • Member
  • *
  • Posts: 7093
Re: Fan - stays too cool
« Reply #18 on: January 28, 2010, 11:59:54 AM »
Quote from: MYSTANGT on January 28, 2010, 10:22:41 AM
...that uis how i installed it....  why am i the odd one out having issues warming up while everyone else has issues cooling down...  :brick:

Although, not for nothing I am VERY glad im runnig too cool VS. too hot   :thumbsup:

i would suggest this - put your hand on the top tank of the rad (start the engine in the morning and let it warm up, when it gets to 160 or so go to the front of the Jeep and put your hand on the rad) - it helps if you have someone telling you the temps. When you feel the rad starting to warm up even a little is when your thermostat has opened - check the temp at the gauge. If it never gets warm then Dave was right and your heater keeps the engine cool. If it gets warm before getting to 190 or 195 then your thermostat is not closing properly or opens too soon.
Logged
'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

Dylan

  • Guest
Re: Fan - stays too cool
« Reply #19 on: January 30, 2010, 02:39:38 PM »
When you installed the t-stat, did you put the side with the coil spring toward the engine or toward the t-stat housing?
Logged

Offline sharpxmen

  • Chief Squirrel BlowerŪ
  • Member
  • *
  • Posts: 7093
Re: Fan - stays too cool
« Reply #20 on: January 30, 2010, 05:18:38 PM »
Quote from: Dylan on January 30, 2010, 02:39:38 PM
When you installed the t-stat, did you put the side with the coil spring toward the engine or toward the t-stat housing?

since is stays too cool i would think he installed it properly (with the spring towards the engine), the other way around would have issues with not being warmed in time to open - my guess
Logged
'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

Dylan

  • Guest
Re: Fan - stays too cool
« Reply #21 on: January 30, 2010, 11:43:29 PM »
Quote from: sharpxmen on January 30, 2010, 05:18:38 PM
since is stays too cool i would think he installed it properly (with the spring towards the engine), the other way around would have issues with not being warmed in time to open - my guess
When installed correctly, the thermostat valve is held closed by the return spring; normal system pressure also aids keep the valve closed.  As the thermostat heats up, the heat-sensing portion expands, forcing the thermostat valve open.  If the thermostat is installed backwards then normal system pressure could possibly overcome the return spring and force the valve open.
Logged

Offline sharpxmen

  • Chief Squirrel BlowerŪ
  • Member
  • *
  • Posts: 7093
Re: Fan - stays too cool
« Reply #22 on: January 31, 2010, 01:13:57 AM »
Quote from: Dylan on January 30, 2010, 11:43:29 PM
When installed correctly, the thermostat valve is held closed by the return spring; normal system pressure also aids keep the valve closed.  As the thermostat heats up, the heat-sensing portion expands, forcing the thermostat valve open.  If the thermostat is installed backwards then normal system pressure could possibly overcome the return spring and force the valve open.

dylan, i know how it works, the reason is installed that way is so the hot water is on the thermostat side (the piston that pushes the spring), you install it backwards it will open later than the actual temp that is meant for, try it and you'll see (although it might not fit in the jeep housing, dunno). the pressure wont be enough to push the spring as it would be relieved thru the heater circuit.
Logged
'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

Dylan

  • Guest
Re: Fan - stays too cool
« Reply #23 on: January 31, 2010, 12:18:52 PM »
I'm also quite aware of how it's supposed to work.  The problem at hand is everything is supposedly set up properly and should be working, but it isn't.  When I encounter a situation where all the most likely culprits have already been addressed, I start looking at things that normally shouldn't cause a problem but the possibility does exist.
Logged

MYSTANGT

  • Guest
Re: Fan - stays too cool
« Reply #24 on: February 01, 2010, 07:23:41 AM »
So the spring-side should be going into the block while the other should stay visible to me after i put it in. Then comes the gasket and silicone.... ???  im pretty sure i did it right but I will definetely re-do it all just to be certain...

I havent had time to toy with it this weekend so the cardboard box has been doing the trick but I will get to it this week for sure.

Although I would be very curious to see how my temps would be in the summer  8)
Logged

Offline dwtaylorpdx

  • Member
  • Posts: 1038
Re: Fan - stays too cool
« Reply #25 on: February 07, 2010, 05:45:34 PM »
My coolest best new tool in the toolbox is a basic IR thermometer, gun type, I can
check the radiator tank temps, the engine and exhaust and see where they are really at.
the guages in jeeps are not exactly medical grade,,, more Walmart grade.


If you start a cold engine and temp the manifold legs at 5 minutes and 1 is cold that
cylinder is not firing correctly... :)

Dave

Logged
94 YJ - 2.5 Hesco Cam B&B Ported - AX5 Trans w/Centerforce Dual Friction Clutch - 4" Rough Country Lift W/Skyjacker Shocks - D44 Rear/ARB - D30/ARB - ARB Compressor - Warn M8000 in Custom Bumper - Reunell Rear Bumper - Metalcloak 6" Body Armor Kit - Tuffy Console - 265x85-16 Tires - 2M Radio

Offline bootguy

  • Member
  • Posts: 117
  • TANSTAAFL There Aint No Such Thing As A Free Lunch
Re: Fan - stays too cool
« Reply #26 on: February 09, 2010, 11:27:26 PM »
With the engine cold does your fan run with the ignition switch in the on position but the engine not started?
Logged
1994 Jeep Wrangler, 2.5L, automatic, 2.5" lift, 4:88 gearing, 33" tires, 2.5" exhaust from manifold back, air restrictor removed.
Pages: 1 [2]   Go Up
« previous next »